Does every sedan have a locking sound?

[RonanLynn]

Not every sedan has a locking sound, as the locking beep is not a mandatory feature of vehicles. Setting via the car's central control: Find the "Vehicle Settings" option in the car's system, then enter the "Control Page" and turn on the "Locking Beep" to make the horn sound once when locking the car. Setting via the key: If the car key has a mute button, simply press the mute button towards the car to turn the locking beep on or off. Changing ECU settings: If the car does not have a mute button and cannot be set in the car's system, then the only option is to visit a 4S shop and have a technician modify the ECU data.